The attendants bear off his majesty, and Carlos, left alone, is joined by Merkado, physician to the Queen, who brings her request for an interview, that she may communicate to him his deceased friend's last charge. The prince is to be in the vault at midnight, in the habit of a monk, that he may be taken for the ghost of the dead emperor by the superstitious guards.

The Dukes of Feria and Alba meet in the king's ante-chamber waiting for an audience. Alba has a new discovery to make; a monk has been arrested, who had found private access to the prince's apartment. In the fear of death, he produced a paper, consigned to his care by the Marquis of Posa, and addressed to Carlos, appointing his proposed interview with the Queen at midnight, his subsequent departure from Madrid for the Netherlands, and his rebellion, at the head of those provinces, against the Spanish yoke. Philip enters, but evidently in no condition to hear the communication of his ministers. His passionate grief for the death of Posa, and his lamentations, strikingly display the pride which is the ruling passion of his nature.

King. Give the dead back to me; I must possess him
Again.

Domingo. (to Alba.) Speak you to him.

King. He thought so poorly
Of me, and died i' the error. I must have him
Again; he must think otherwise of me!

Alba. Sire——

King. Who speaks here? have you forgotten whom
You stand before? Why kneel you not—bold man?
I am your king, and I will have submission.
Must all neglect, because there's one has dared
Despise me?

Alba. O, no more of him, my lord!
Another foe, important as he was,
Is in your kingdom's heart!

Feria. Prince Carlos——

King. He had a friend, who has met death for him;
For him—with me he had a kingdom shared!
How looked he down on me! So haughtily
None look down from a throne.